blob: 16aa9dfc5b2b3bb5700be88b685a789ec22bb100 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2019 Google LLC
*/
#define LOG_CATEGORY UCLASS_SOUND
#include <common.h>
#include <audio_codec.h>
#include <dm.h>
#include <i2c.h>
#include "rt5677.h"
#include <log.h>
struct rt5677_priv {
struct udevice *dev;
};
/* RT5677 has 256 8-bit register addresses, and 16-bit register data */
struct rt5677_init_reg {
u8 reg;
u16 val;
};
static struct rt5677_init_reg init_list[] = {
{RT5677_LOUT1, 0x0800},
{RT5677_SIDETONE_CTRL, 0x0000},
{RT5677_STO1_ADC_DIG_VOL, 0x3F3F},
{RT5677_DAC1_DIG_VOL, 0x9090},
{RT5677_STO2_ADC_MIXER, 0xA441},
{RT5677_STO1_ADC_MIXER, 0x5480},
{RT5677_STO1_DAC_MIXER, 0x8A8A},
{RT5677_PWR_DIG1, 0x9800}, /* Power up I2S1 */
{RT5677_PWR_ANLG1, 0xE9D5},
{RT5677_PWR_ANLG2, 0x2CC0},
{RT5677_PWR_DSP2, 0x0C00},
{RT5677_I2S2_SDP, 0x0000},
{RT5677_CLK_TREE_CTRL1, 0x1111},
{RT5677_PLL1_CTRL1, 0x0000},
{RT5677_PLL1_CTRL2, 0x0000},
{RT5677_DIG_MISC, 0x0029},
{RT5677_GEN_CTRL1, 0x00FF},
{RT5677_GPIO_CTRL2, 0x0020},
{RT5677_PWR_DIG2, 0x9024}, /* Power on ADC Stereo Filters */
{RT5677_PDM_OUT_CTRL, 0x0088}, /* Unmute PDM, set stereo1 DAC */
{RT5677_PDM_DATA_CTRL1, 0x0001}, /* Sysclk to PDM filter divider 2 */
};
/**
* rt5677_i2c_read() - Read a 16-bit register
*
* @priv: Private driver data
* @reg: Register number to read
* @returns data read or -ve on error
*/
static int rt5677_i2c_read(struct rt5677_priv *priv, uint reg)
{
u8 buf[2];
int ret;
ret = dm_i2c_read(priv->dev, reg, buf, sizeof(u16));
if (ret)
return ret;
return buf[0] << 8 | buf[1];
}
/**
* rt5677_i2c_write() - Write a 16-bit register
*
* @priv: Private driver data
* @reg: Register number to read
* @data: Data to write
* @returns 0 if OK, -ve on error
*/
static int rt5677_i2c_write(struct rt5677_priv *priv, uint reg, uint data)
{
u8 buf[2];
buf[0] = (data >> 8) & 0xff;
buf[1] = data & 0xff;
return dm_i2c_write(priv->dev, reg, buf, sizeof(u16));
}
/**
* rt5677_bic_or() - Set and clear bits of a codec register
*
* @priv: Private driver data
* @reg: Register number to update
* @bic: Mask of bits to clear
* @set: Mask of bits to set
* @returns 0 if OK, -ve on error
*
*/
static int rt5677_bic_or(struct rt5677_priv *priv, uint reg, uint bic,
uint set)
{
uint old, new_value;
int ret;
old = rt5677_i2c_read(priv, reg);
if (old < 0)
return old;
new_value = (old & ~bic) | (set & bic);
if (old != new_value) {
ret = rt5677_i2c_write(priv, reg, new_value);
if (ret)
return ret;
}
return 0;
}
/**
* rt5677_reg_init() - Initialise codec regs w/static/base values
*
* @priv: Private driver data
* @returns 0 if OK, -ve on error
*/
static int rt5677_reg_init(struct rt5677_priv *priv)
{
int ret;
int i;
for (i = 0; i < ARRAY_SIZE(init_list); i++) {
ret = rt5677_i2c_write(priv, init_list[i].reg, init_list[i].val);
if (ret)
return ret;
}
return 0;
}
#ifdef DEBUG
static void debug_dump_5677_regs(struct rt5677_priv *priv, int swap)
{
uint i, reg_word;
/* Show all 16-bit codec regs */
for (i = 0; i < RT5677_REG_CNT; i++) {
if (i % 8 == 0)
log_debug("\nMX%02x: ", i);
rt5677_i2c_read(priv, (u8)i, &reg_word);
if (swap)
log_debug("%04x ", swap_bytes16(reg_word));
else
log_debug("%04x ", reg_word);
}
log_debug("\n");
/* Show all 16-bit 'private' codec regs */
for (i = 0; i < RT5677_PR_REG_CNT; i++) {
if (i % 8 == 0)
log_debug("\nPR%02x: ", i);
rt5677_i2c_write(priv, RT5677_PRIV_INDEX, i);
rt5677_i2c_read(priv, RT5677_PRIV_DATA, &reg_word);
if (swap)
log_debug("%04x ", swap_bytes16(reg_word));
else
log_debug("%04x ", reg_word);
}
log_debug("\n");
}
#endif /* DEBUG */
static int rt5677_hw_params(struct rt5677_priv *priv, uint bits_per_sample)
{
int ret;
switch (bits_per_sample) {
case 16:
ret = rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_DL_MASK,
0);
if (ret) {
log_debug("Error updating I2S1 Interface Ctrl reg\n");
return 1;
}
break;
default:
log_err("Illegal bits per sample %d\n", bits_per_sample);
return -EINVAL;
}
return 0;
}
/**
* rt5677_set_fmt() - set rt5677 I2S format
*
* @priv: Private driver data
* @returns 0 if OK, -ve on error
*/
static int rt5677_set_fmt(struct rt5677_priv *priv)
{
int ret = 0;
/*
* Set format here: Assumes I2S, NB_NF, CBS_CFS
*
* CBS_CFS (Codec Bit Slave/Codec Frame Slave)
*/
ret = rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_MS_MASK,
RT5677_I2S_MS_S);
/* NB_NF (Normal Bit/Normal Frame) */
ret |= rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_BP_MASK,
RT5677_I2S_BP_NOR);
/* I2S mode */
ret |= rt5677_bic_or(priv, RT5677_I2S1_SDP, RT5677_I2S_DF_MASK,
RT5677_I2S_DF_I2S);
/* A44: I2S2 (going to speaker amp) is master */
ret |= rt5677_bic_or(priv, RT5677_I2S2_SDP, RT5677_I2S_MS_MASK,
RT5677_I2S_MS_M);
if (ret) {
log_err("Error updating I2S1 Interface Ctrl reg\n");
return ret;
}
return 0;
}
/**
* rt5677_reset() - reset the audio codec
*
* @priv: Private driver data
* @returns 0 if OK, -ve on error
*/
static int rt5677_reset(struct rt5677_priv *priv)
{
int ret;
/* Reset the codec registers to their defaults */
ret = rt5677_i2c_write(priv, RT5677_RESET, RT5677_SW_RESET);
if (ret) {
log_err("Error resetting codec\n");
return ret;
}
return 0;
}
/**
* Initialise rt5677 codec device
*
* @priv: Private driver data
* @returns 0 if OK, -ve on error
*/
int rt5677_device_init(struct rt5677_priv *priv)
{
int ret;
/* Read status reg */
ret = rt5677_i2c_read(priv, RT5677_RESET);
if (ret < 0)
return ret;
log_debug("reg 00h, Software Reset & Status = 0x%04x\n", ret);
/* Reset the codec/regs */
ret = rt5677_reset(priv);
if (ret)
return ret;
ret = rt5677_i2c_read(priv, RT5677_VENDOR_ID1);
if (ret < 0) {
log_err("Error reading vendor ID\n");
return 1;
}
log_debug("Hardware ID: %0xX\n", ret);
ret = rt5677_i2c_read(priv, RT5677_VENDOR_ID2);
if (ret < 0) {
log_err("Error reading vendor rev\n");
return 1;
}
log_debug("Hardware revision: %04x\n", ret);
return 0;
}
static int rt5677_set_params(struct udevice *dev, int interface, int rate,
int mclk_freq, int bits_per_sample,
uint channels)
{
struct rt5677_priv *priv = dev_get_priv(dev);
int ret;
/* Initialise codec regs w/static/base values, same as Linux driver */
ret = rt5677_reg_init(priv);
if (ret)
return ret;
ret = rt5677_hw_params(priv, bits_per_sample);
if (ret)
return ret;
ret = rt5677_set_fmt(priv);
if (ret)
return ret;
return 0;
}
static int rt5677_probe(struct udevice *dev)
{
struct rt5677_priv *priv = dev_get_priv(dev);
priv->dev = dev;
return rt5677_device_init(priv);
}
static const struct audio_codec_ops rt5677_ops = {
.set_params = rt5677_set_params,
};
static const struct udevice_id rt5677_ids[] = {
{ .compatible = "realtek,rt5677" },
{ }
};
U_BOOT_DRIVER(rt5677_drv) = {
.name = "rt5677",
.id = UCLASS_AUDIO_CODEC,
.of_match = rt5677_ids,
.ops = &rt5677_ops,
.probe = rt5677_probe,
.priv_auto_alloc_size = sizeof(struct rt5677_priv),
};